Thanks for the replies so far. I think I have to explicitly determine movement from the captured images, so I'll have to use a dsp. The cmucam looks like it's not too hard to interface with, but I'll have to use the first cam, since the idea of the project is to make it cost effective and the other two are quite expensive. Does anyone have any suggestions about the gprs module used to transmit jpegs to a webserver? Another thing that I forgot to mention is that the camera needs to be able to work at night. Someone suggested using those LED arrays or something to do that. Does anyone know they work and how much work it's going to be?